Using ALP Radio Mute and Control Functions

[ApexOnYou]

I dont see how a diode will do the trick ? i would like to understand how , not to confront your saying

There is no relay alone that can be triggered by any of the wire green or blue.
None of those wires push enough amperage to run even the tinyest relay .

There is a way but dont know if you have access to advanced.

Think of the diode as an electronic check valve - flow is only permitted one way. If the ALP mute wire is in fact outputting 5v at standby (I don't recall what mine was doing) and ground when triggered a diode will block the 5v from reaching the radio circuit while still allowing the circuit to ground on activation. There's probably a better explanation of this on www.the12volt.com

You can most certainly trigger relays from the ALP outputs though. You only need a few mA of current for a positive trigger and a ground for a negative trigger relay setup. Not saying OP should or shouldn't interfere with the cars brake circuit, just clarifying on the relay topic.